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Bobcat 120 Compact Excavator Pdf Repair and Service Manual
Bobcat 120 Compact Excavator Pdf Repair and Service Manual
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Bobcat 120 Compact Excavator PDF Repair and Service Manual
The Bobcat 120 Compact Excavator was designed for contractors who need dependable digging performance in areas where larger excavators cannot operate efficiently. Its compact crawler design, responsive hydraulic system and durable construction make it ideal for residential construction, utility trenching, landscaping, drainage projects and municipal maintenance. Combining excellent maneuverability with reliable breakout force, the Bobcat 120 is built to handle demanding excavation tasks while maintaining precise control in confined work environments.
From excavating foundations and installing underground utilities to grading terrain and site preparation, the Bobcat 120 delivers consistent hydraulic performance throughout long operating days. The machine supports a variety of attachments including digging buckets, grading buckets, hydraulic breakers and augers, allowing operators to complete multiple jobs with a single excavator. Its balanced design also improves stability while reducing operator fatigue during repetitive digging cycles.
After extended service, components such as hydraulic pumps, control valves, swing drives, travel motors, final drives, boom cylinders and electrical systems require accurate diagnosis before repairs begin. The official Bobcat Factory Service Manual provides dealership-level repair procedures, enabling technicians to inspect, troubleshoot, repair and verify every major machine system using OEM specifications and testing methods.
Engineered for Professional Excavation
The Bobcat 120 is built to maximize productivity on compact job sites without compromising durability. Its hydraulic system is engineered for smooth attachment control, efficient digging cycles and dependable lifting performance, making it a practical choice for contractors, rental fleets and maintenance professionals working in restricted areas.
Machine Information
| Manufacturer | Bobcat Company |
| Model | 120 |
| Machine Type | Compact Hydraulic Excavator |
| Operating Configuration | Crawler Excavator |
| Engine Type | Liquid-Cooled Diesel Engine |
| Hydraulic System | High-Performance Hydraulic System |
| Travel Drive | Dual Hydrostatic Travel Motors |
| Swing Drive | Hydraulic Swing Motor with Reduction Gear |
| Boom Configuration | Heavy-Duty Excavator Boom |
| Bucket Linkage | Hydraulic Bucket Cylinder System |
| Undercarriage | Steel Track Crawler |
| Operator Station | ROPS/FOPS Protective Canopy or Optional Cab |
| Compatible Attachments | General Purpose Bucket, Trenching Bucket, Grading Bucket, Hydraulic Breaker, Auger, Grapple |
| Typical Applications | Construction, Utility Installation, Landscaping, Drainage, Demolition and Site Preparation |
| Key Engineering Feature | Compact Design with Reliable Hydraulic Digging Performance |
OEM Workshop Repair Procedures
The factory service manual follows the same structured repair process used by Bobcat dealership technicians. Hydraulic performance is evaluated through pressure and flow testing before pumps or valves are replaced. Swing system problems are diagnosed by inspecting the swing motor, reduction gearbox and bearing assemblies, while travel system faults are isolated through hydrostatic drive and final drive testing. Complete electrical wiring diagrams and diagnostic procedures simplify troubleshooting of charging, starting, instrumentation and machine safety circuits.
Factory Service Coverage
- Complete engine inspection and overhaul procedures
- Fuel system diagnosis and repair
- Cooling system inspection and servicing
- Hydraulic pump testing and overhaul
- Main hydraulic control valve servicing
- Boom, arm and bucket cylinder rebuilding
- Hydraulic hose and pipeline replacement
- Swing motor and reduction gearbox repair
- Travel motor inspection and overhaul
- Final drive servicing and rebuilding
- Undercarriage inspection and track adjustment
- Boom, arm and bucket linkage repair procedures
- Electrical wiring diagrams and connector locations
- Charging, starting and safety system diagnostics
- Instrument panel and sensor testing
- Hydraulic troubleshooting charts
- Torque specifications and wear limits
- Complete disassembly, reassembly and operational testing
Manual Technical Information
| Manual Type | OEM Factory Repair & Service Manual |
| Publication Number | 6900940 |
| Model Covered | Bobcat 120 Compact Excavator |
| Language | English |
| Format | |
| Searchable | Yes |
| Bookmarks | Yes |
| Printable | Yes |
| Hydraulic Schematics | Included |
| Electrical Wiring Diagrams | Included |
| Diagnostic Procedures | Included |
| Troubleshooting Charts | Included |
| Hydraulic Pressure Tests | Included |
| Torque Specifications | Included |
| Inspection Standards | Included |
| Disassembly & Reassembly | Included |
| Compatible Devices | Windows, macOS, Android, iPhone & Tablets |
| Instant Digital Download | Yes |
Frequently Asked Questions
Which machine does this service manual cover?
This OEM factory repair manual is specifically written for the Bobcat 120 Compact Excavator.
Does the manual include hydraulic and electrical diagnostics?
Yes. It includes complete hydraulic schematics, electrical wiring diagrams, diagnostic procedures, troubleshooting charts and factory testing instructions.
Can this manual be used for complete excavator repairs?
Yes. It covers engine overhaul, hydraulic pump servicing, swing drive repair, travel motor overhaul, final drive rebuilding, boom and bucket linkage repairs, electrical diagnostics and complete machine reassembly.
Who should use this factory service manual?
It is ideal for professional mechanics, Bobcat dealerships, construction equipment workshops, fleet maintenance teams and owners seeking OEM repair procedures for the Bobcat 120 Compact Excavator.
